Rewrite clipboard write IPC handling to be easier to understand.

content/renderer/renderer_clipboard_client.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file provides the embedder's side of the Clipboard interface.
 
 #include "content/renderer/renderer_clipboard_client.h"
 
 #include "base/memory/shared_memory.h"
 #include "base/numerics/safe_math.h"
-#include "base/strings/string16.h"
 #include "content/common/clipboard_messages.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/renderer/render_thread_impl.h"
-#include "content/renderer/scoped_clipboard_writer_glue.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/gfx/size.h"
 
 namespace content {
 
-namespace {
-
-class RendererClipboardWriteContext : public ClipboardClient::WriteContext {
- public:
-  RendererClipboardWriteContext();
-  virtual ~RendererClipboardWriteContext();
-  virtual void WriteBitmapFromPixels(ui::Clipboard::ObjectMap* objects,
-                                     const void* pixels,
-                                     const gfx::Size& size) OVERRIDE;
-  virtual void Flush(const ui::Clipboard::ObjectMap& objects) OVERRIDE;
-
- private:
-  scoped_ptr<base::SharedMemory> shared_buf_;
-  DISALLOW_COPY_AND_ASSIGN(RendererClipboardWriteContext);
-};
-
-RendererClipboardWriteContext::RendererClipboardWriteContext() {
-}
-
-RendererClipboardWriteContext::~RendererClipboardWriteContext() {
-}
-
-// This definition of WriteBitmapFromPixels uses shared memory to communicate
-// across processes.
-void RendererClipboardWriteContext::WriteBitmapFromPixels(
-    ui::Clipboard::ObjectMap* objects,
-    const void* pixels,
-    const gfx::Size& size) {
-  // Do not try to write a bitmap more than once
-  if (shared_buf_)
-    return;
-
-  base::CheckedNumeric<uint32> checked_buf_size = 4;
-  checked_buf_size *= size.width();
-  checked_buf_size *= size.height();
-  if (!checked_buf_size.IsValid())
-    return;
-
-  uint32 buf_size = checked_buf_size.ValueOrDie();
-
-  // Allocate a shared memory buffer to hold the bitmap bits.
-  shared_buf_.reset(ChildThread::current()->AllocateSharedMemory(buf_size));
-  if (!shared_buf_)
-    return;
-
-  // Copy the bits into shared memory
-  DCHECK(shared_buf_->memory());
-  memcpy(shared_buf_->memory(), pixels, buf_size);
-  shared_buf_->Unmap();
-
-  ui::Clipboard::ObjectMapParam size_param;
-  const char* size_data = reinterpret_cast<const char*>(&size);
-  for (size_t i = 0; i < sizeof(gfx::Size); ++i)
-    size_param.push_back(size_data[i]);
-
-  ui::Clipboard::ObjectMapParams params;
-
-  // The first parameter is replaced on the receiving end with a pointer to
-  // a shared memory object containing the bitmap. We reserve space for it here.
-  ui::Clipboard::ObjectMapParam place_holder_param;
-  params.push_back(place_holder_param);
-  params.push_back(size_param);
-  (*objects)[ui::Clipboard::CBF_SMBITMAP] = params;
-}
-
-// Flushes the objects to the clipboard with an IPC.
-void RendererClipboardWriteContext::Flush(
-    const ui::Clipboard::ObjectMap& objects) {
-  if (shared_buf_) {
-    RenderThreadImpl::current()->Send(
-        new ClipboardHostMsg_WriteObjectsSync(objects, shared_buf_->handle()));
-  } else {
-    RenderThreadImpl::current()->Send(
-        new ClipboardHostMsg_WriteObjectsAsync(objects));
-  }
-}
-
-}  // anonymous namespace
-
 RendererClipboardClient::RendererClipboardClient() {
 }
 
-RendererClipboardClient::~RendererClipboardClient() {
-}
-
-ui::Clipboard* RendererClipboardClient::GetClipboard() {
-  return NULL;
-}
-
 uint64 RendererClipboardClient::GetSequenceNumber(ui::ClipboardType type) {
   uint64 sequence_number = 0;
   RenderThreadImpl::current()->Send(
       new ClipboardHostMsg_GetSequenceNumber(type, &sequence_number));
   return sequence_number;
 }
 
 bool RendererClipboardClient::IsFormatAvailable(content::ClipboardFormat format,
                                                 ui::ClipboardType type) {
   bool result = false;
@@ skipping 46 matching lines @@
   }
 }
 
 void RendererClipboardClient::ReadCustomData(ui::ClipboardType clipboard_type,
                                              const base::string16& type,
                                              base::string16* data) {
   RenderThreadImpl::current()->Send(
       new ClipboardHostMsg_ReadCustomData(clipboard_type, type, data));
 }
 
-ClipboardClient::WriteContext* RendererClipboardClient::CreateWriteContext() {
-  return new RendererClipboardWriteContext;
+void RendererClipboardClient::WriteText(ui::ClipboardType clipboard_type,
+                                        const base::string16& text) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_WriteText(clipboard_type, text));
+}
+
+void RendererClipboardClient::WriteHTML(ui::ClipboardType clipboard_type,
+                                        const base::string16& markup,
+                                        const GURL& url) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_WriteHTML(clipboard_type, markup, url));
+}
+
+void RendererClipboardClient::WriteSmartPasteMarker(
+    ui::ClipboardType clipboard_type) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_WriteSmartPasteMarker(clipboard_type));
+}
+
+void RendererClipboardClient::WriteCustomData(
+    ui::ClipboardType clipboard_type,
+    const std::map<base::string16, base::string16>& data) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_WriteCustomData(clipboard_type, data));
+}
+
+void RendererClipboardClient::WriteBookmark(ui::ClipboardType clipboard_type,
+                                            const GURL& url,
+                                            const base::string16& title) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_WriteBookmark(clipboard_type, url, title));
+}
+
+bool RendererClipboardClient::WriteImage(ui::ClipboardType clipboard_type,
+                                         const SkBitmap& bitmap) {
+  // Only 32-bit bitmaps are supported.
+  DCHECK_EQ(bitmap.colorType(), kN32_SkColorType);
+
+  const gfx::Size size(bitmap.width(), bitmap.height());
+  scoped_ptr<base::SharedMemory> shared_buf;
+  {
+    SkAutoLockPixels locked(bitmap);
+    void* pixels = bitmap.getPixels();
+    // TODO(piman): this should not be NULL, but it is. crbug.com/369621
+    if (!pixels)
+      return false;
+
+    base::CheckedNumeric<uint32> checked_buf_size = 4;
+    checked_buf_size *= size.width();
+    checked_buf_size *= size.height();
+    if (!checked_buf_size.IsValid())
+      return false;
+
+    // Allocate a shared memory buffer to hold the bitmap bits.
+    uint32 buf_size = checked_buf_size.ValueOrDie();
+    shared_buf.reset(ChildThread::current()->AllocateSharedMemory(buf_size));
+    if (!shared_buf)
+      return false;
+    // Copy the bits into shared memory
+    DCHECK(shared_buf->memory());
+    memcpy(shared_buf->memory(), pixels, buf_size);
+    shared_buf->Unmap();
+  }
+
+  RenderThreadImpl::current()->Send(new ClipboardHostMsg_WriteImage(
+      clipboard_type, size, shared_buf->handle()));
+  return true;
+}
+
+void RendererClipboardClient::CommitWrite(ui::ClipboardType clipboard_type) {
+  RenderThreadImpl::current()->Send(
+      new ClipboardHostMsg_CommitWrite(clipboard_type));
 }
 
 }  // namespace content